HW Unit 1.4 Chemical Economics-Formula
1.
A.
B.
C.
D.
The compound N2O4 is called
Nitrogen monoxide
Nitrogen dioxide
Dinitrogen tetroxide
Dinitrogen trioxide
2. The correct formula for lithium sulphide is
A. LiS
B. Li2S
C. LiS2
D. Li2S2
3. Z is a non-metal. It forms a compound with magnesium with the formula Mg3Z2. The nonmetal Z must belong to group
A. 4
B. 5
C. 6
D. 7
4. The compound Magnesium Flourate contains the following elements:
A Magnesium and Flourine
B Magnesium, Flourine and Oxygen
C Magnesium, Phosphorus and Oxygen
D Magnesium and flourate.
5.
A2
B3
C5
D1
The valency of Copper in Cu2O3 is:
6 The formula for Copper (II) chloride is
A CuCl
B CuCl2
C Cu7Cl2
D Cu2Cl
7. Which word equation is correct for the following reaction? Potassium metal reacts violently
with water producing hydrogen gas and a solution of potassium hydroxide.
A Potassium metal + water -> hydrogen gas + potassium hydroxide solution
B Potassium + water -> hydrogen + potassium hydroxide
C Potassium metal + water = hydrogen gas + potassium hydroxide
D Potassium + water =hydrogen + potassium hydroxide
8. Convert the following word equation into a chemical equation.
Nitrogen(g)
+
hydrogen(g) -> nitrogen hydride(g)
A N2(g) +H(g) = N H 3(g)
B N(g) + H (g) -> NH 3(g)
C N2 (g) + H 2(g) -> NH 3(g)
D N2 (g) + H 2(g) -> N H (g)
9. What is the GFM of Ca Cl2?
A 151
B 115.5
C 75.5
D 111
10. What is the GFM of Magnesium chloride?
A 84.5
B 60
C 95.5
D 120
11. The manufacture of nitric acid from ammonia is known as the Ostwald process. In the first
stage of the process ammonia gas is reacted with oxygen gas to produce nitrogen monoxide
gas and steam. The reaction is exothermic. A platinum gauze catalyst is also used.
In the second stage of the process the nitrogen monoxide is allowed to react with more
oxygen to form the brown gas nitrogen dioxide.
In the third stage of the process the nitrogen dioxide is reacted with water and oxygen to
produce nitric acid (HNO3) as the only product.
a) Write a word equation for the first stage of the above process.
b) What is the chemical formula for nitrogen dioxide?
c) Write a word equation for the third stage of the process.